Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Indication or control of braking – acceleration – or deceleration
Reexamination Certificate
1998-12-04
2001-01-23
Cuchlinski, Jr., William A. (Department: 3661)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Indication or control of braking, acceleration, or deceleration
C701S072000, C701S083000, C188S024140, C188S024110, C188S024120, C303S020000, C303S140000, C303S146000, C303S147000
Reexamination Certificate
active
06178367
ABSTRACT:
BACKGROUND OF THE INVENTION
(a) Field of the Invention
The present invention relates to a brake system for a motor-driven vehicle, and more particularly to such a brake system which automatically cuts off power supply from the motor-driven vehicle when driven to stop the vehicle from moving.
(b) Description of the Prior Art
The motor of a regular motor-driven vehicle, for example, a motor bicycle, is controlled through power source, which is controlled by a main processing unit and sensor means. As illustrated in
FIG. 1
, handle grip sensor means, pedal sensor means, vehicle speed sensor means and brake sensor means are respectively connected to a main processing unit, which receives power supply from a battery through a voltage stabilizer circuit, and controls a motor drive to drive the motor subject to detected message from the sensor means connected thereto. The brake sensor means is commonly installed in the hand grip to detect displacement of the brake lever or brake cable. When the brake lever or brake cable is moved over a predetermined distance, the brake sensor means immediately outputs a signal to the main processing unit, causing it to cut off power supply from the motor. This design is not satisfactory in function. Because an elastic fatigue tends to occur after long uses of the brake system, the brake sensor means may be unable to accurately detect the braking operation of the brake system, i.e., the brake sensor means may output an error signal to the main processing unit, causing the main processing unit to keep the motor operating when the rider stops the vehicle, or causing the main processing unit to cut off power supply from the motor when the vehicle is running.
SUMMARY OF THE INVENTION
The present invention has been accomplished to provide a brake system for a motor-driven vehicle which eliminates the aforesaid problems. According to the present invention, the brake system is mounted on a motor-driven vehicle and controlled to stop the motor-driven vehicle from moving and to simultaneously cut off power supply from the motor of the motor- driven vehicle, the brake system comprising: a brake device driven by brake cable means to stop the motor-driven vehicle from moving; two electrically conductive friction means respectively fastened to the brake device and driven by the brake device to press on two opposite sides of a metal part of wheel means of the motor-driven vehicle in stopping the motor-driven vehicle from moving; a main processor, which controls the operation of the motor of the motor-driven vehicle; and two electric wires respectively connected between the electrically conductive friction means and two opposite terminals of the main processor; wherein when the electrically conductive friction means are forced by the brake device to press on the two opposite sides of the metal part of the wheel means of the motor-driven vehicle, the electric wires are electrically connected to produce a signal to the main processing unit, causing the main processing unit to cut off power supply from the motor of the motor-driven vehicle. According to one embodiment of the present invention, the electrically conductive friction means each have a tubular mounting rod at an outer side respectively fastened to brake arms of the brake device the electric wires are respectively connected to the electrically conductive friction means and extended out of the tubular mounting rods of the electrically conductive brake shoes.
According to another embodiment of the present invention, the brake device comprises a binding ring, which supports the electrically conductive friction means, an insulative layer retained between the electrically conductive friction means and the binding ring, and a metal brake disk, which is forced by the electrically conductive friction means to stop the motor-driven vehicle from moving. According to still another embodiment of the present invention, the brake device comprises two brake arms, a metal brake disk mounted on a wheel, and two brake shoes respectively mounted on the brake arms and insulated from the brake arms by electrically insulative means and driven to stop the metal brake disk from rotation; the two electrically conductive friction means are respectively fastened to the brake shoes of the brake device and moved with the brake shoes to press on the two opposite sides of the metal brake disk.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1
is a circuit block diagram of the brake system of a motor-driven vehicle according to the prior art.
FIG. 2
illustrates a brake system installed in a motor-driven vehicle according to the present invention.
FIG. 3
is a perspective view of a brake detector for a brake system according to the first embodiment of the present invention.
FIG. 4
is a sectional view of the brake detector of the first embodiment of the present invention.
FIG. 5
is a perspective view of a brake detector for a brake system according to a second embodiment of the present invention.
FIG. 6
is a perspective view of a brake detector for a brake system according to a third embodiment of the present invention.
FIG. 7
is a side view of the brake detector of the third embodiment of the present invention.
FIG. 8
is a perspective view of a brake detector for a brake system according to a fourth embodiment of the present invention.
FIG. 9
is a sectional view of the brake detector of the fourth embodiment of the present invention.
REFERENCES:
patent: 5215167 (1993-06-01), Davidson
patent: 5743360 (1998-04-01), Ke
patent: 5829845 (1998-11-01), Maron et al.
patent: 5979608 (1999-11-01), Muraoka
Bacon & Thomas PLLC
Cuchlinski Jr. William A.
Marc-Coleman Marthe
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